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Chapter 7---Troubleshooting
7-2
Model 250 Service Manual
Left/Right Orientation:
When referring to the left or right in this chapter, it is
with reference to standing at the rear of the projector, facing the screen
.
Connectors
on subassemblies and PCBs have tabs that must be released first
before pulling on the connector. The proper procedure is to push slightly
IN
on
the connector, then squeeze the tab, then pull the connector out.
7.2 LEDs
Backpanel LEDs
This section covers the various terminals, detectors, and LEDs visible from the
rear and left side of the projector with the rear projector cover and rear panel
removed.
Operation Status LED - This LED indicates the status of the projector. When the
LED is illuminated green, the projector is operating normally. When the LED is
illuminated orange, the projector is in standby mode, which means that the
projector has AC power but has not yet received a POWER ON command. If the
LED is illuminated flashing red, the projector has experienced an error and will
display an error code (see Table 7-1 and Table 7-2).
Service Mode Switch - The Service Mode Switch is used when updating software
to the CPU. The projector must POWERED OFF and the AC Circuit Breaker
must be cycled off. The Service Mode Switch is pushed while turning the AC
Circuit Breaker ON. This starts the projector in the Service Mode. The Software
Update section (see Software Updating, section 8.1) contains the full procedure
for updating CPU software.
Terminal In - The Terminal In is a RS232 port used to communicate with the
projector or Import/Export setup data using a PC or Laptop computer, a switching
device such as a Crestron Control Switcher, or the optional Tethered Technician
Remote Control.